Mitsubishi S12A2 User Manual

5-8
Chapter 5 DISASSEMBLY OF BASIC ENGINE
2. Rear Mechanism - Disassemble and Inspect
Understanding of the current engine condition before disassembling is very important to know the cause of trouble and do the
efficient work.
Depending on the maintenance work or purpose, it is desirable to inspect some of the following items before proceeding with
any job.
Flywheel Face and Radial Runout - Measure
Timing Gear Backlash - Measure
Idler Gear and Camshaft End Play - Measure
Rear Mechanism - Disassemble and Inspect
Replace: Gasket, O-ring
Flaw, wear
Oil hole clogging
Flaking, wear,
key way deformation and wear
Groove crack, wear
Crack, dowel hole defect
Crack, dowel hole defect,
flaw on gear, abnormal wear
Flaw, wear,
key groove defect
Wear, flaw,
deterioration
Electronic
governor spec
Oil pressure
governor spec
Hour meter spec
Tachometer spec
Non-
attachment spec
Non-
attachment spec
Non-
attachment spec
Non-
attachment spec
Wear, flaw, deterioration
13
14
11
12
5
3
8
9
9
9
10
2
1
1
4
6
7
Disassembling Sequence
1 Pick up (electronic governor spec)
2 Flywheel (Approx. 83 kg [183 lb])
3 Timing gear case (Approx. 43 kg [95 lb])
4 Oil seal
5 Oil seal slinger
6 Thrust plate
7 Idler gear
8 Fuel injection pump gear
9 Accessory drive (electronic governor spec)
Governor drive (Oil pressure governor spec)
(Refer to the chapter "FUEL SYSTEM" for disassembly, in-
spection and assembly.)
10 Camshaft gear
11 Thrust plate
12 Camshaft (Approx. 25 kg [55 lb.])
13 Idler shaft
14 Rear plate (Approx. 21 kg [46 lb])

Mitsubishi S12A2 Specifications

General

Brand	Mitsubishi
Model	S12A2
Category	Engine
Language	English